initramfs-framework: create /dev/console
Some kernels, for example linux-yocto 3.19 for qemux86, fail to execute /init in an initramfs unless there is already a /dev/console char device in the initramfs. Booting then fails with: Kernel panic - not syncing: /dev/console is missing or not a character device! Please ensure your rootfs is properly configured The panic itself comes from a linux-yocto specific patch to kernel_init_freeable in init/main.c, but even without it, that function will print an error when /dev/console is missing. The kernel's Documentation/initrd.txt also mentions creating that device. It remained unclear why this is not a problem on other machines. On intel-corei7-64 from meta-intel, something (the kernel?) creates /dev/console and /dev/[012] before transfering control to the init script. In that case, creating /dev/console in advance is not necessary, but does not cause any problem either. (From OE-Core rev: 0352841cd92f6316bcac092e2fff9d28c352b36b) Signed-off-by: Patrick Ohly <patrick.ohly@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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@ -34,6 +34,11 @@ do_install() {
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# debug
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install -m 0755 ${WORKDIR}/debug ${D}/init.d/00-debug
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# Create device nodes expected by some kernels in initramfs
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# before even executing /init.
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install -d ${D}/dev
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mknod -m 622 ${D}/dev/console c 5 1
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}
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PACKAGES = "${PN}-base \
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@ -42,7 +47,7 @@ PACKAGES = "${PN}-base \
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initramfs-module-e2fs \
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initramfs-module-debug"
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FILES_${PN}-base = "/init /init.d/99-finish"
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FILES_${PN}-base = "/init /init.d/99-finish /dev"
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SUMMARY_initramfs-module-mdev = "initramfs support for mdev"
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RDEPENDS_initramfs-module-mdev = "${PN}-base"
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